Writing instrument



FIG. 1 is a rear elevational view of a writing instrument showing our new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a left side elevational view;

FIG. 4 is a front elevational view;

FIG. 5 is a top plan view;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a rear elevational view of a second embodiment of our new design;

FIG. 8 is a right side elevational view of FIG. 7;

FIG. 9 is a left side elevational view of FIG. 7;

FIG. 10 is a front elevational view of FIG. 7;

FIG. 11 is a top plan view of FIG. 7; and,

FIG. 12 is a bottom plan view of FIG. 7. 

The ornamental design for a writing instrument, as shown and described. 